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Finding the Fourth Proportional to 1,395.54, 2,093.40 and 665.64

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Solution

The fourth proportional to 1,395.54, 2,093.40 and 665.64 is: 998.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.54 : 2,093.40 = 665.64 : x
  2. Step 2: Convert to fraction form
    1,395.54/2,093.40 = 665.64/x
  3. Step 3: Cross multiply
    1,395.54x = 2,093.40 × 665.64
  4. Step 4: Simplify right side
    1,395.54x = 1,393,450.78
  5. Step 5: Solve for x
    x = 1,393,450.78/1,395.54
  6. Step 6: Final answer
    x = 998.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.